fix(deps): update rust crate itertools to 0.12.1

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
itertools	dependencies	patch	0.12.0 -> 0.12.1

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Release Notes

rust-itertools/itertools (itertools)

v0.12.1

Compare Source

Added

• Documented iteration order guarantee for Itertools::[tuple_]combinations (#​822)
• Documented possible panic in iterate (#​842)
• Implemented Clone and Debug for Diff (#​845)
• Implemented Debug for WithPosition (#​859)
• Implemented Eq for MinMaxResult (#​838)
• Implemented From<EitherOrBoth<A, B>> for Option<Either<A, B>> (#​843)
• Implemented PeekingNext for RepeatN (#​855)

Changed

• Made CoalesceBy lazy (#​801)
• Optimized Filter[Map]Ok::next, Itertools::partition, Unique[By]::next[_back] (#​818)
• Optimized Itertools::find_position (#​837)
• Optimized Positions::next[_back] (#​816)
• Optimized ZipLongest::fold (#​854)
• Relaxed Debug bounds for GroupingMapBy (#​860)
• Specialized ExactlyOneError::fold (#​826)
• Specialized Interleave[Shortest]::fold (#​849)
• Specialized MultiPeek::fold (#​820)
• Specialized PadUsing::[r]fold (#​825)
• Specialized PeekNth::fold (#​824)
• Specialized Positions::[r]fold (#​813)
• Specialized PutBackN::fold (#​823)
• Specialized RepeatN::[r]fold (#​821)
• Specialized TakeWhileInclusive::fold (#​851)
• Specialized ZipLongest::rfold (#​848)

Notable Internal Changes

• Added test coverage in CI (#​847, #​856)
• Added semver check in CI (#​784)
• Enforced clippy in CI (#​740)
• Enforced rustdoc in CI (#​840)
• Improved specialization tests (#​807)
• More specialization benchmarks (#​806)

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